Townsend said Hagibis would likely have little effect on the match against Russian Federation, but it could have an impact on their game in Yokohama and possibly Ireland's match with Samoa in Fukuoka on Saturday.
Typhoon Hagibis is expected to bring torrential rain and violent winds to southern Japan this weekend, potentially causing havoc to the final World Cup group stage matches.
Flying Fijians Coach, John McKee says Fiji must maintain a strong momentum for the full 80 minutes to mount pressure and create scoring opportunities as Wales are renown for their defensive work rate and strength in the breakdowns.
There's a storm brewing at the Rugby World Cup - quite literally.
Hagibis - dubbed the "strongest storm on the planet" by the Weather Network - could also continue its easterly track and miss Japan altogether.
Super Typhoon Hagibis is now categorised as violent, JMA's highest classification.
Ireland will roll out all their big guns for Saturday's Pool A decider against the Samoans in Fukuoka, with quarter-final qualification on the line.
Atmospheric scientist Matthew Cappucci described Habigis' rapid intensification as "mind-boggling", while the Weather Channel said it was "one of the most explosive intensification bursts on record".
However, with the storm shifting east, there is now a massive threat for two other huge games in Yokohama, just south of Tokyo.
"We are now monitoring the development of a typhoon off the south coast of Japan in partnership with our weather information experts", said a World Rugby spokesman.
Organisers warned later Tuesday that it "remains too early to fully predict the movement and impact of the storm".
"The latest modelling from our weather information experts and the Japan Meteorological Agency indicates that the typhoon is tracking in a north-westerly direction and could bring high winds and heavy rain to southern Japan on October 12 and 13".
The game's governing body has contingency plans to shift venues to see all the final pool encounters completed, though any that fall foul of the weather would be deemed scoreless draws. While we have robust contingency plans in place for pool matches, such plans, if required, will only be actioned if the safety of teams, fans, and workforce can be guaranteed. Japan upset the Springboks in their opening game, won three matches, but defeat to Scotland saw them fail to qualify.
But a cancellation would be a disaster for the Scots, who would be unable to progress assuming Ireland beat Samoa, as expected, the day before.